So given his ODI record too, Mitch Marsh is basically the right-arm version of James Faulkner.
If we're not willing to play Faulkner in the Test side because of his batting, why are we willing to play Marsh?
completely different bowlers. Marsh is a seamer, Faulkner has a good repertoire of cutters and changes in pace. Gripping, dry and two paced decks may suit Faulkner.